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[Qemu-devel] [PULL 1/5] pc-bios/s390-ccw: avoid floating point operation
From: |
Christian Borntraeger |
Subject: |
[Qemu-devel] [PULL 1/5] pc-bios/s390-ccw: avoid floating point operations |
Date: |
Tue, 6 Oct 2015 12:41:01 +0200 |
Some gcc versions (e.g. Fedora 22 gcc 5.1.1) seem to use floating
point registers for spilling and filling of general purpose registers.
As the BIOS does not activate the AFP register setting of CR0 this can
cause data exception program checks.
Disallow floating point in the BIOS as a simple solution.
Signed-off-by: Christian Borntraeger <address@hidden>
Reviewed-by: David Hildenbrand <address@hidden>
Signed-off-by: Jens Freimann <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Christian Borntraeger <address@hidden>
---
pc-bios/s390-ccw/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile
index 746603a..15e4232 100644
--- a/pc-bios/s390-ccw/Makefile
+++ b/pc-bios/s390-ccw/Makefile
@@ -10,7 +10,8 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw)
.PHONY : all clean build-all
OBJECTS = start.o main.o bootmap.o sclp-ascii.o virtio.o
-CFLAGS += -fPIE -fno-stack-protector -ffreestanding
-fno-delete-null-pointer-checks
+CFLAGS += -fPIE -fno-stack-protector -ffreestanding
+CFLAGS += -fno-delete-null-pointer-checks -msoft-float
LDFLAGS += -Wl,-pie -nostdlib
build-all: s390-ccw.img
--
2.4.3
- [Qemu-devel] [PULL 0/5] s390x: Fixes and features, Christian Borntraeger, 2015/10/08
- [Qemu-devel] [PULL 3/5] s390x: set missing parent for hotplug and quiesce events, Christian Borntraeger, 2015/10/08
- Re: [Qemu-devel] [PULL 0/5] s390x: Fixes and features, Peter Maydell, 2015/10/08
- [Qemu-devel] [PULL 2/5] s390x/gdb: expose virtualization specific registers, Christian Borntraeger, 2015/10/08
- [Qemu-devel] [PULL 4/5] s390x/info registers: print vector registers properly, Christian Borntraeger, 2015/10/08
- [Qemu-devel] [PULL 1/5] pc-bios/s390-ccw: avoid floating point operations,
Christian Borntraeger <=
- [Qemu-devel] [PULL 5/5] s390x: rename io_subsystem_reset -> subsystem_reset, Christian Borntraeger, 2015/10/08
- Re: [Qemu-devel] [PULL 0/5] s390x: Fixes and features, Christian Borntraeger, 2015/10/08